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running right ?

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49er
Posts: 36
Joined: Wed Sep 10, 2008 12:05 am
Bikes: 49 el chopper

running right ?

#1

Post by 49er » Mon Apr 27, 2009 2:19 am

Hey I have been riding the bike and modifing and tuning ect. but when sitting at idle it runs good on the front, pop pop pop but the rear waits a while to fire, it seems to hit every 3rd time or something. also it is cooler to touch for a while, than the front.then it warms up. it dont hit as many times as the front. but on the road it seems fine. smooth as heck. no problem. the rear plug is slightly black while the front is a pretty brown. the rear is brown near the electrode for about 1/16 of an inch.then turns sutty black. it usually starts 1 kick, it wants to run. I dont see why the 2 cyclendars dont fire equally. at idle anyway.



john HD
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Posts: 3674
Joined: Sat Aug 20, 2005 7:24 pm
Bikes: '42 WLA X 2, '55FL, '93 Ultra Classic, '91 Fatboy, '97 883, '71 Suzuki Duster 125, '83 GPz 750.

Re: running right ?

#2

Post by john HD » Mon Apr 27, 2009 2:23 am

manifold leak?

john

FlatHeadSix
Moderator
Posts: 2681
Joined: Sun Jun 06, 2004 5:14 pm
Bikes: '31 VL, '34 VD, '45 WLA, '47 WL, '49 FL, '51 WL, '58 ST (Hummer), '71 GE (Servi)
Location: Lonoke, Arkansas

Re: running right ?

#3

Post by FlatHeadSix » Mon Apr 27, 2009 3:35 am

MANIFOLD LEAK!

old52pan
Posts: 103
Joined: Thu Jan 29, 2009 8:14 pm
Bikes: 49 pan and a 52 pan project
Location: wisconsin

Re: running right ?

#4

Post by old52pan » Tue Apr 28, 2009 5:18 am

try swapping the plug wires around. could be ignition/spark problem.

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